When a guy's fat gut is so huge it resembles a hippopotamus head ... it therefore must be a hippopotamus that only has 2 legs and has purchased itself a lovely man's head for a hat (probably not such a lovely hat given the size of the gut)
girl 1: so i'd been drinking alot of beer
girl 2: yeah...
girl 1: and then it was just so big
girl 2: yeah...
girl 1: that i regurgitated some beer foam while giving him head.